document.write( "Question 1145931: Arron’s boat travels 9 mile per hour in still water. The speed of the river is 4 miles per hour. How long will it take Arron to travel 18 miles upstream? \n" ); document.write( "
Algebra.Com's Answer #767204 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "(1) His upstream speed is the difference between his speed in still water and the speed of the current.

\n" ); document.write( "(2) The time required for the upstream trip is the distance, divided by his upstream speed.

\n" ); document.write( "Two simple calculations which you should be able to do....
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